Yes, thanks I had seen that:

"How do I attach a file to a post?To attach a file to your post, you need to be using the main 'New Post' or 'New Thread' page and not 'Quick Reply'. To use the main 'New Post' page, click the 'Post Reply' button in the relevant thread."

I cannot see my post under "New Post". I cannot find a "New Thread" page. I can find my post in the VBA code forum. But there is no "post reply" button. I can click on my post which leads me here again.